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Second-line test: This method is a simple measurement method that does
not use the auxiliary grounding rod. It uses the existing grounding electrode
with the smallest value of the grounding resistance as the auxiliary grounding
electrode, and uses two simple test lines to connect the HS interface and the
E-FR interface. ). The auxiliary ground rods H and S may be replaced with
metallic ground pipes such as metal water pipes and fire hydrants, common
grounding of commercial power systems, or lightning protection grounds of
buildings, etc., and the oxide layer of the connection points of the selected
metal auxiliary grounding body should be removed during measurement. Floor.
Wiring as shown below, the instrument operation with the four-wire test.
When using the commercial power system grounding as an auxiliary
grounding pole measurement, it must be confirmed that it is the
grounding pole of a commercial power system. Otherwise, the circuit
breaker may start up and be in danger.
Use a simple two-wire method to measure the grounding resistance, and
try to select the grounding body with a small re value as the auxiliary
grounding electrode so that the meter reading is closer to the true value.
When measuring, please select the metal water pipe and metal fire
hydrant as the auxiliary grounding electrode.
Two-wire easy Test Grounding Resistance its reading on Tester is the
